Quarterly Results (Unaudited) (Schedule Of Unaudited Quarterly Statement Of Operations Data) (Details) (USD $)	3 Months Ended									12 Months Ended
	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012		Dec. 31, 2011	Sep. 24, 2011	Jun. 25, 2011	Mar. 30, 2013	Mar. 31, 2012	Mar. 26, 2011
Quarterly Results (Unaudited) [Abstract]
Net sales	$ 206,873,000	$ 310,133,000	$ 193,774,000	$ 99,006,000	$ 110,631,000	[1]	$ 122,368,000	$ 101,602,000	$ 92,242,000	$ 809,786,000	$ 426,843,000	$ 369,571,000
Gross margin	83,614,000	158,050,000	100,087,000	53,440,000	62,347,000	[1]	66,030,000	54,355,000	47,709,000	395,191,000	230,441,000	201,995,000
Net income	26,360,000	67,862,000	35,449,000	6,927,000	50,827,000	[1]	16,731,000	11,247,000	9,178,000	136,598,000	87,983,000	203,503,000
Basic income per share	$ 0.41	$ 1.04	$ 0.55	$ 0.11	$ 0.79	[1]	$ 0.26	$ 0.17	$ 0.14	$ 2.12	$ 1.35	$ 3.00
Diluted income per share	$ 0.39	$ 0.99	$ 0.51	$ 0.10	$ 0.75	[1]	$ 0.25	$ 0.17	$ 0.13	$ 2.00	$ 1.29	$ 2.82
Income tax benefit					39,500,000					64,592,000	(8,000,000)	(119,289,000)
Decrease in valuation allowance on deferred tax assets					$ 37,300,000

[1] The $39.5 million tax benefit recorded in the fourth quarter of 2012 favorably impacted net income, as a result of a $37.3 million release in valuation allowance on deferred tax assets.